[issue20526] python: Modules/gcmodule.c:379: visit_decref: Assertion `((gc)->gc.gc_refs >> (1)) != 0' failed.

[Charles-François Natali]

Charles-François Natali added the comment:

Random thoughts:
- executor-created threads are daemon (unfortunately)
- see issue #19466: I think that the change to clear the frame of daemon
threads was a mistake

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20526>
_______________________________________